<?php 
define('DB_HOST','localhost');
define('DB_USER','hingsli');
define('DB_PASS','123456');
define('DB_NAME','review_app');

$conn =new mysqli(DB_HOST,DB_USER,DB_PASS,DB_NAME);

if ($conn->connect_error) {
    die("连接失败".$conn->connect_error);
}
echo"连接成功"